Not confident with automotive wiring? Have a professional harness builder or tuner do it, or check your work before first power-up. A wiring mistake can damage the ECU, the engine or the car, or start a fire.
100%
Stock ECU being replaced
GND
GND
MAXXECUMINI-C1-E1 GPO 3
ECM power (J271 relay feed)
0V sensor
MAXXECUMINI-C1-D2 TPS
0V sensor
0V sensor
MAXXECUMINI-C1-C3 AIN 3 (0-5V)
MAXXECUMINI-C1-B1 DIN 1 (Hall only)
MAXXECUMINI-C1-E3 CAN L
MAXXECUMINI-C1-E4 CAN H
MAXXECUMINI-C1-D1 GPO 8/TACHO
MAXXECUMINI-C1-G2 GPO 1
MAXXECUMINI-C1-G1 GPO 2
5V ref
5V ref
MAXXECUMINI-C1-A1 TRIGGER
5V ref
MAXXECUMINI-C1-C2 IAT
MAXXECUMINI-C1-H3 INJ 4
MAXXECUMINI-C1-H1 INJ 2
0V sensor
0V sensor
MAXXECUMINI-C1-C1 CLT
MAXXECUMINI-C1-F4 IGN 4
MAXXECUMINI-C1-F2 IGN 2
MAXXECUMINI-C1-G3 INJ 1
MAXXECUMINI-C1-H2 INJ 3
5V ref
5V ref
MAXXECUMINI-C1-C4 AIN 4 (0-5V)
MAXXECUMINI-C1-F1 IGN 1
MAXXECUMINI-C1-F3 IGN 3
0V sensor
ECM + coil power (J271 relay feed)
OEM-T121
Stock ECU being replaced
1ECU ground
2ECU ground
5Wideband lambda heater (Z19)
21ECM power (J271 relay feed)
29MAF sensor ground (G70)
33Accelerator pedal position 1 (G79)
34Accelerator pedal position 1 ground (G79)
36Accelerator pedal position 2 ground (G185)
53MAF sensor signal (G70)
54Road speed signal (VSS)
58CAN bus low
60CAN bus high
63Post-cat lambda heater (Z29)
65Fuel pump relay control
66Secondary-air pump relay (J299)
72Accelerator pedal position 1 5V supply (G79)
73Accelerator pedal position 2 5V supply (G185)
82Crank position sensor (G28)
83Throttle position sensor 5V supply (G187/G188)
85Intake air temperature (G42)
88Injector 4 (N33)
89Injector 2 (N31)
90Crank position sensor ground (G28)
91Throttle position sensor ground (G187/G188)
93Engine coolant temperature (G62)
94Ignition coil 4 (N163)
95Ignition coil 2 (N128)
96Injector 1 (N30)
97Injector 3 (N32)
98Cam + boost sensor 5V supply (G40/G31)
99Knock sensor 5V supply (G61/G66)
101Boost pressure sensor (G31)
102Ignition coil 1 (N127)
103Ignition coil 3 (N158)
108Sensor ground
121ECM + coil power (J271 relay feed)
MAXXECUMINI
MAXXECUMINI-C1
MAXXECUMINI
A1TRIGGER
A2TRIGGER GND
B1DIN 1 (Hall only)
B3SENSOR GND
B4SENSOR GND
C1CLT
C2IAT
C3AIN 3 (0-5V)
C4AIN 4 (0-5V)
D1GPO 8/TACHO
D2TPS
D4SENSOR GND
E1GPO 3
E2+5V sensor supply
E3CAN L
E4CAN H
F1IGN 1
F2IGN 2
F3IGN 3
F4IGN 4
G1GPO 2
G2GPO 1
G3INJ 1
G4ENGINE GND
H1INJ 2
H2INJ 3
H3INJ 4
H4+12V (ECU power supply)
OEM-T121-82 Crank position sensor (G28)
0V sensor
OEM-T121-54 Road speed signal (VSS)
0V sensor
0V sensor
OEM-T121-93 Engine coolant temperature (G62)
OEM-T121-85 Intake air temperature (G42)
OEM-T121-53 MAF sensor signal (G70)
OEM-T121-101 Boost pressure sensor (G31)
OEM-T121-63 Post-cat lambda heater (Z29)
OEM-T121-33 Accelerator pedal position 1 (G79)
0V sensor
OEM-T121-5 Wideband lambda heater (Z19)
5V ref
OEM-T121-58 CAN bus low
OEM-T121-60 CAN bus high
OEM-T121-102 Ignition coil 1 (N127)
OEM-T121-95 Ignition coil 2 (N128)
OEM-T121-103 Ignition coil 3 (N158)
OEM-T121-94 Ignition coil 4 (N163)
OEM-T121-66 Secondary-air pump relay (J299)
OEM-T121-65 Fuel pump relay control
OEM-T121-96 Injector 1 (N30)
GND
OEM-T121-89 Injector 2 (N31)
OEM-T121-97 Injector 3 (N32)
OEM-T121-88 Injector 4 (N33)
+12V (ECU power supply)
SP-GND · 4 pins
SP-0V · 11 pins
SP-5V1 · 7 pins
SP-14V · 4 pins
Press enter or space to select a node. You can then use the arrow keys to move the node around. Press delete to remove it and escape to cancel.
Press enter or space to select an edge. You can then press delete to remove it or escape to cancel.
43 / 43 connections
Columns ▾
Lengths need a layout. Add bundles in Layout.
Not set yet: signal, colour, stripe, ident.
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